You have to a design a flexible highway pavement with soaked CBR value of soil subgrade...

You have to a design a flexible highway pavement with soaked CBR value of soil subgrade equal to 4%. Draw a typical cross-section of the pavement as considered currently worldwide.

Solutions

Expert Solution

Consider the following example of design

Design the pavement for construction of a new bypass with the following data:
1. Two lane carriage way
2. Initial traffic in the year of completion of construction = 400 CVPD (sum of both directions)
3. Traffic growth rate = 7.5 %
4. Design life = 15 years
5. Vehicle damage factor based on axle load survey = 2.5 standard axle per commercial vehicle
6. Design CBR of subgrade soil = 4%.
Solution
1. Distribution factor = 0.75
2.
N =
365 ×
-

(1 + 0.075)15 − 1)
0.075
× 400 × 0.75 × 2.5
= 7200000
= 7.2 msa
3. Total pavement thickness for CBR 4% and traffic 7.2 msa from IRC:37 2001 chart1 = 660 mm
4. Pavement composition can be obtained by interpolation from Pavement Design Catalogue (IRC:37 2001).
(a) Bituminous surfacing = 25 mm SDBC + 70 mm DBM
(b) Road-base = 250 mm WBM
(c) sub-base = 315 mm granular material of CBR not less than 30 %

Ally Wells answered 2 weeks ago

Next > < Previous

Related Solutions

1. The CBR value of subgrade soil is 5%, calculate the thickness of a flexible highway...

1. The CBR value of subgrade soil is 5%, calculate the thickness of a flexible highway pavement as per the relevant Australian standard. 2. What are the benefits of using the geotextile layer in the construction of haul roads? Explain briefly.

Using the AASHTO 1993 Flexible Pavement Design Procedure, design a pavement cross section that will provide...

Using the AASHTO 1993 Flexible Pavement Design Procedure, design a pavement cross section that will provide 10 years service. The initial PSI is 4.2 and the final PSI is determined to be 2.5. The subgrade has a soil resilient modulus of 18,000 psi. Reliability is 95% with an overall standard deviation of 0.4. For design, the daily truck traffic consists of 400 passes of trucks with two single axles and 350 passes of semitrailer truck with tandem axles. The axle...

A new highway is to be constructed. Design A calls for a concrete pavement costing$90 per...

A new highway is to be constructed. Design A calls for a concrete pavement costing$90 per foot with a 20-year life;four paved ditches costing $5 per foot each; and four box culverts every mile, each costing $9,000 and having a 20-year life. Annual maintenance will cost $1,700 per mile; the culverts must be cleaned every five years at a cost of$350 each per mile. Design B calls for a bituminous pavement costing $45 per foot with a 10-year life;four sodded ditches...

Compare between Flexible Pavement Design using Asphalt Institute Methods and AASHTO Design method.

Design the flexible pavement using Group index method and California bearing ratio method using the following...

Design the flexible pavement using Group index method and California bearing ratio method using the following data and compare the pavements. Soil portion passing 75 micron sieve = 60% Liquid limit = 43% and plastic limit = 28% Area of the plunger = 19.6 cm2 Load at 2.5 mm penetration = 45kg Load at 5 mm penetration = 68kg Sub-base CBR = 30% Base course CBR = 70% Expected traffic = 900 vehicles per day.

How will you design the foundation of a structure in Swelling soil.

Do you think the atmospheric temperature and soil temperature will have an impact on the organisms...

Do you think the atmospheric temperature and soil temperature will have an impact on the organisms you are able to culture? Why? Also, what are two examples of nutrients soil bacteria may require to grow on a culture plate?

Imagine that you have discovered a new element in the soil of Mars called Marsantium (Ms)....

Imagine that you have discovered a new element in the soil of Mars called Marsantium (Ms). Martian elements have slightly different properties than elements found on Earth – full valence shells have 16 electrons rather than 2 or 8. Ms contains 15 electrons in its valence shell. (Assume that the laws of physics still apply on Mars.) 1. Is Ms likely to be reactive (form bonds with other atoms)? Why or why not? 2. You mix Ms together with another...

Calculate Liming Requirements. You have a soil sample with a CEC of 10 meq / 100...

Calculate Liming Requirements. You have a soil sample with a CEC of 10 meq / 100 g soil, a pH of 4.8 and a BS of 37%. You would like to raise this soil to a pH of 6.5, so you need to raise the BS to 65%. You also have a Mg deficiency. Assume 93% purity of your liming agent. During screening of a 100g sample, you had 1.5 g on the 8-mesh screen, and 13.4 g on the...

Experimental Study Design Suppose that you have been hired by the university administration to design a...

Experimental Study Design Suppose that you have been hired by the university administration to design a randomized experimental study to assess the following hypothesis among undergraduate students: Attending weekly yoga classes leads to better performance on exams. Be sure that your study design addresses the following elements: Refine the study hypothesis so that it is as specific as possible and contains all elements of a “good” hypothesis. Remember that the design, conduct, and analysis of the study flows from the...

Subjects